Perovskite nanocrystals (NCs) have become leading candidates for solution-processed optoelectronics applications. While substantial work has been published on 3-D perovskite phases, the NC form of the zero-dimensional (0-D) phase of this promising class of materials remains elusive. Here we report the synthesis of a new class of colloidal semiconductor NCs based on Cs4PbBr6, the 0-D perovskite, enabled through the design of a novel low-temperature reverse microemulsion method with 85% reaction yield. These 0-D perovskite NCs exhibit high photoluminescence quantum yield (PLQY) in the colloidal form (PLQY: 65%), and, more importantly, in the form of thin film (PLQY: 54%). Notably, the latter is among the highest values reported so far for perovskite NCs in the solid form. Our work brings the 0-D phase of perovskite into the realm of colloidal NCs with appealingly high PLQY in the film form, which paves the way for their practical application in real devices.

Perovskite nanocrystals (NCs) have become leading candidates for solution-processed optoelectronics applications. While substantial work has been published on 3-D perovskite phases, the NC form of the zero-dimensional (0-D) phase of this promising class of materials remains elusive. Here we report the synthesis of a new class of colloidal semiconductor NCs based on Cs4PbBr6, the 0-D perovskite, enabled through the design of a novel low-temperature reverse microemulsion method with 85% reaction yield. These 0-D perovskite NCs exhibit high photoluminescence quantum yield (PLQY) in the colloidal form (PLQY: 65%), and, more importantly, in the form of thin film (PLQY: 54%). Notably, the latter is among the highest values reported so far for perovskite NCs in the solid form. Our work brings the 0-D phase of perovskite into the realm of colloidal NCs with appealingly high PLQY in the film form, which paves the way for their practical application in real devices.

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dc.description.sponsorship

We gratefully acknowledge funding support from KAUST, Technology Innovation Center for Solid-State Lighting at KAUST.

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dc.publisher

American Chemical Society (ACS)

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dc.relation.url

http://pubs.acs.org/doi/abs/10.1021/acs.jpclett.7b00105

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dc.title

Zero-Dimensional Cs4PbBr6 Perovskite Nanocrystals

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dc.type

Article

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dc.contributor.department

Physical Sciences and Engineering (PSE) Division

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dc.identifier.journal

The Journal of Physical Chemistry Letters

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kaust.author

Zhang, Yuhai

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kaust.author

Saidaminov, Makhsud I.

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kaust.author

Dursun, Ibrahim

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kaust.author

Yang, Haoze

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kaust.author

Banavoth, Murali

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kaust.author

Alarousu, Erkki

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kaust.author

Yengel, Emre

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kaust.author

Alshankiti, Buthainah A.

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kaust.author

Bakr, Osman M.

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kaust.author

Mohammed, Omar F.

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